Apparatus for cutting binding-threads.



A. TSCHERNE. APPARATUS FOR CUTTING BINDING THREADS.

APPLICATION FILED NOV. 12, 1913.

1,104,848. Patented July 28, 1914.

2 SHEETS-SHEET l.

THE NORRIS PETERS 00.. PHOTO-LITHD WASHINGTON. D. C.

A. TSOHERNE.

APPARATUS FOR CUTTING BINDING THREADS.

APPLICATION FILED NOV. 12, 1913.

Patented July 28, 1914.

2 SHEETSSHEET 2.

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Vz'zinewasi- NORRIS PETERS ((1. PHOTO-LI'I'HQ. WASHINGTON. D. (V

UNITED STATES PATENTOFFICE. 7

ALOIS 'rsormmva or RORSCI-IAGH, swrrznnnnun.

I APPARATUS r03 CUTTING BINDIN -THREADS; 1

To all whom alt-may concern: 5

Be it known that I, ALoIs TsoI-IEaNE, a subject of the Emperor of Austria-Hungary,-

This lnvention relates to improvements in apparatus for cutting binding threads and in particular to an apparatus of this kind having two knives converging toward the front end of the apparatus and provided with an endless band, or the like, which passes over rollers and which is moved backward along the fabric during the-forward movement of the apparatus to anextent cor responding to said forw'ard'movement of the apparatus, thereby holding the binding threads seized by the apparatus fast till they are cut by the knives.

Apparatus of. this kind for cutting binding threads are already known and they are used for finishing embroidered fabricp'ieces taken ofi the embroidering machine, such a fabric piece being at first unfolded upon a table whereupon the apparatus is moved by hand along the fabric piece. binding threads seized by the front end "of the apparatus are brought against the knife edges and they are cut by the latter near their ends. The lower half of the endless band acts during the working of the apparatus as a pressuremember and the table forms a support for said band part, so that the binding threads seized by the apparatus are prevented from being pulled off by. the. knife-edges during the cutting, i. 6. said threads are pressed against thefabric piece. Now these apparatus have the drawback,

that they cannot be used for finishing.em-

broidered fabric pieces tensioned in the em broidering machine, for, while the fabric is stretched in the machine, no support for the apparatus is present, which could replacethe Hereby the broider'ing machine, itis necessary to em- Specificati on of Letters: Patent. Patented July 28,1914.

Application filed November 12, 1913. Serial No. 800,595.

ploy a special workwoma'n' for cutting the workwoman could easily be spared, if the blnding threads of the fabric piece tensioned binding threads; Y On the other hand this in the .embroidering machine could be cut 7 bythe helper working at the back of the machine and having much leisure time at her disposal. To make this possible, the lower half of theendless band of such an appa ratus for cutting binding threads is pressed" 7 according to the present invention against a support arranged between the knives, so that the binding threads may be cut near the fabric surface, viz. near their ends without being pulled off or being broken.

One form of constructionof the invention will now be described as an example, reference being made to the accompanying drawings, in which- Figure 1 is a front view of the apparatus, r

Fig. 2 a plan view of Fig. 1,.Fig. 3 a section on the line 'A-B of Fig. 1; Fig. 4 is apart plan view. of the apparatus, Fig.5 a secso tic-n on an enlarged scale of adetail of the apparatus; Fig. 6 is a frontview ofja rhodificatio-n of a part of the apparatus showing a collecting receptacle for the out off binding threads, Fig. 7 is a plan view on the line 'U-D of Fig. 6; Fig. 8 is a section on the line EF of Fig. 7.

In the construction of the apparatus shown in the drawings ldesignates a pierced base plate provided with a longitudinal rib '2, arranged in the middle of said plate. The f plate 1 is further provided with a supportingi frame 4:, arranged above the'plate and longitudinal sides 1- of the plate 1 convergv ing toward the front end of the apparatus are fixed two flat knife blades 7 the edges of which are directed outward and arranged parallel tothe sides 1 of the plate 1. The

knives are pressed by .means of clamping,

'plates 8 against the under-side of the plate 1 3 and 5) and they are capable of being adjusted. Two rails 9 adjustably fixed to the plate .1 are also parallelto the edges of the two knives 7. The front ends of'these rails 9 are bent upward, so that they do not get caught by the binding threads to be out ofi. As shown inFigs. 2, Sand-4, there is provided between these rails 9 and the. I

the frame 1, 6 and keeping back the'binding,

threads to be cut off. This holding .member consists'of an endless flexible band or strip 12, which may be made for instance of india-rubber. This band 12 is arranged between the plate 1 and the guiding member 6 and it passes over horizontal rollers 13, 14 capable of rotating. The rear roller 13 is supported by an arm 15 fixed to the frame a, while the front roller 14; is carried by a link 16, which is pivotally connected to an arm 17 of a slide 18 adjustably attached to the guiding member6. (Fig. 1). If said slide and the roller 14 are moved along the guide member 6 the tension of the band 12 is altered. Above the lower half of the band 12 situated immediately above the rib r 2 of the plate 1 there is provided. a pressure rail 19, which is parallel to said band 12 and which is pressed by means of a spring actuated jaw 20 against the lower half of said band, pressing thereby this band part slightly against the plate 1. The rail 19 is guided in a suitable manner by means of the jaw 20 projecting laterally beyond said rail and by means of an arm 21 provided on the slide 18, so that said rail cannot be displaced in an accidental manner with regard to the band 12. The aw 20 is pivotally connected to a lever 22 acted upon by a spring and pivotally connected to an arm of a slide 23 capable of being adjusted along the guiding member 6. An adjustmentof the slide 23 causes a displacement of the jaw 20 along the rail 19.

A rotary movement is imparted to the band 12 as soon as the apparatus is moved forward along the embroidered fabric, the

band being then moved in such a direction, that its lower part is moved backward to an extent corresponding to the forward movement of the apparatus. For this purpose there is adjustably mounted near the rear end of the apparatus upon the base plate 1 a roller 24: projecting below said plate and covered with emery cloth. There is further fixed to a lever 25 pivotally connected to the frame 4: a roll 26 made of india-rubber, which is pressed by means of a tension spring 27 actingupon the lever 25 as well against the roller 24 as against the band 12 passing over the rear roller 13, transmitting thereby the rotatory motion of the roller to the band 12.

The guiding member 6 is also provide'd with a scale, with which an index line provided on the slide 23 coincides. (Fig. 2). The figures near the lines of the scale indicate different lengths of the binding threads. The clamping jaw 20 is arranged immediately beneath the slide 23, exercising each time the greatest pressure upon the rail 19,

and upon the lower part of the band 12, at the point, where it has been shifted. If the binding threads of the embroidered fabric piece have approximately the same length, the slide 23, and the clamping jaw 20 may be adjusted with regard to the scale in such a manner, that its position corresponds to that length of the threads. In this manner it is possible for the lower half of the band to exercise at that point the greatest pressure upon the binding threads to be cut off, where the latterare cut by the knives 7.

The working of the apparatus hereinbefore described is as follows: If the apparatjus is moved by hand along the rear side of the embroidered fabric tensioned in the embroidering machine, the binding threads being. all on the rear fabric side, the roller U 24 is rotated owing to the friction produced on the fabric and by means of the roller 26 the band 12 is moved in the direction of the arrow shown in Fig. 1. As the apparatus is moved forward, along the fabric, the lower half of the band 12 is moved in the opposite direction, '5. e. backward, to an extent corresponding to this forward movement of the apparatus. The inserted piece 10 or 11 seizes then the binding threads, so that they come to lie above the plate 1 and between thei latter and the lower half of the band 12. Aslsoon as a binding thread is seized by this band 12 it is held fast by the latter relatively tothe apparatus till it is cut, so that this thread cannot be pulled off by the knife edges. The binding thread is. held fast owing to the backward movement of the lower half of the band 12 relatively to the plate 1 and owing to the nature of the band which is made of indiarubber, or of a material to which the thread may easily be brought to adhere by the rail 19 and the jaw 20 acting upon the lower half of the band 12. The binding threads are cut off just in the moment, in which they are tensioned above the plate 1 and in which they touch with their ends the edges of the two knives, the threads being then out very near theifabric surface, viz. near their ends.

In order to prevent the member 10 or 11- which seizes the binding threads from enteringiinto circular or similar shaped holes of embroidered pieces across which are stretched the threads to be out, there may be used instead of narrow tongues 10, adapted for flat and unopen work, the tongues 11 shown in Fig. 4 having an enlarged front end.

It is evident that the apparatus forming the subject matter of the present application may also be used for cutting binding threads of fabric pieces taken off the embroidering machine. Instead of the two members 1 and 12 holding back the binding threads, there may as well be provided two movable members, for instance two endless bands acting as a clamp, or there may be providedonly one endless band without support, the band being provided on its outer side with means for holding the binding threads, for instance small hooks.

The apparatus according to the present invention is capable of cutting binding threads of different length and also loose binding threads without it being necessary to adjust any parts of this apparatus.

In order to prevent the binding threads cut off with an apparatus according to the present invention from falling into the machine, where they could cause trouble, there may be provided on the apparatus a collecting receptacle for these threads carried backward by the endless band and stripped OK the latter by a fiat brush pressed against said band.

In the construction of the apparatus show in Figs. 6-8 there is illustrated such a receptacle, the parts corresponding to those shown in Figs. 15 being indicated by the same reference letters.

The collecting receptacle for the cut off binding threads is arranged between the roller 13 and the roller 24. This receptacle consists partly of the plate 1 and of caps 28, provided on both sides of the rollers 13, and partly of the roller 13 and of a vertical wall 29 carried by the plate 1 and connecting the caps 28. The open sides of the caps 28 are opposite each other and they form the lateral walls of the receptacle, which is open at its upper end.

Inside the collecting receptacle there is provided the flat stripping ofi brush 30. This brush has an inclined position rela-' tively to the walls of the receptacle and it is pressed against the band 12 passing over the roller 13. The brush is detachably fixed to the receptacle by means of two bent tongues 31, which are inserted in cars 32 provided in the wall 29. (Figs. 68). The two caps 28 and the wall 29 are made of a piece of sheet iron, which is detachably secured to the plate 1 (Fig. 7).

The cut off binding threads seized by the endless band 12 and conveyed backward between the lower part of said band and the plate 1 are stripped oif the band 12 by the brush 3O dropping then into the receptacle.

For the purpose of emptying the collecting receptacle there is provided on the plate 1 a longitudinal opening 33 situated beneath the brush 30 and normally covered by a plate 35 pivotally mounted on a pivot 34 provided on the underside of the plate 1,

said cover being held in its closed position by a clamping nose 36 engaging a corner of said plate (Fig. 7 If the binding threads collected in the hereinbefore described receptacle have to be taken out of the latter, the cover 35 is rotated about the pivot 34 thus uncovering the opening 35 in the plate 1.

I claim:

1. In an apparatus for cutting binding threads, two knife-edges converging toward the front end of the apparatus, an endless band, means for moving the latter, a support between said knives, and means for pressing the lower half of said band against said support to hold the threads while they are cut.

2. In an apparatus for cutting binding threads, two knife-edges converging toward the front end of the apparatus, an endless band for holding the threads while they are cut, means for moving said band, a rail resting upon the lower half of said band, a spring actuated presser aw acting upon said rail, and a stationary plate arranged to sup port the lower half of said band 3. In an apparatus for cutting binding threads, two knife-edges converging toward the front end of the apparatus, an endless band, rollers for supporting the latter, a rail resting upon the lower half of said band, a presser jaw, a spring actuated lever carrying said an adjustable slide carrying said lever, a stationary guide member parallel to the band and supporting the slide adjustably mounted on said member, a stationary plate supporting the lower half of said band, and means for moving the-band.

4. In an apparatus for cutting binding threads, two knife-edges converging toward the front end of the apparatus, an endless band, rollers for supporting the latter, a rail resting upon the lower half of said band, a spring actuated presser jaw acting upon said rail, a stationary plate supporting the lower half of said band, a roller provided with a rough surface and rotatable by friction produced during the forward movement of the apparatus upon the fabric, and an intermediate roller arranged to transmit the motion of said first mentioned roller to said band.

5. In an apparatus for cutting binding threads, two knife-edges converging toward the front end of the apparatus, an endless band for holding the threads while they are cut, means for moving said band, a rail resting upon the lower half of said band, a spring actuated presser j aw acting upon said rail, and a stationary plate supporting the lower half of said band and having beveled longitudinal sides, the'thin blades forming the knives being clamped to said beveled sides of the'plate to cut the binding threads near the fabric surface.

6. In an apparatus for cutting binding threads, two knife-edges converging toward the front end of the apparatus, an endless band for holding the threads fast while they are cut, a tongue at the front end of the apparatus arranged to seize the binding threads, a support between said knives, means for pressing the lower half of said band against said support, and means for moving said band.

71in an apparatus for cutting binding threads, two knife-edges converging toward the front end of the apparatus, an endless band for holding the threads while they are cut, a support between said knives, means for pressing the lower half of said band against said support, means for moving said band, a brush to strip the cut binding threads frointhe endless band which conveys them backward, and a receptacle for collecting the cut threads.

8. In an apparatus for cutting binding threads, the knife edges converging toward the front end of the apparatus, an endless band, guide rollers therefor, means for moving the band, a rail resting upon the lower half of said band, a spring actuated presser jaw acting upon said rail, a stationary plate supporting the lower half of said band, a brush to strip the cut binding threads from the endless band, and a receptacle for collecting the cut threads, said receptacle being formed partly by the stationary plate and by caps attached at both ends of the rear guiding roller for the endless band and partly by a wall connecting the caps and by said rear guiding roller.

9. In an apparatus for cutting binding threads, two knife edges converging toward the front end of the apparatus, guide rollers, an endless band passing over said rollers and holding the threads while they are cut, a rail resting upon the lower half of said band, a spring actuated presser jaw acting upon said rail, a stationary plate supporting the lower half of said band, means for moving said band, a brush to strip the cut binding threads from the endless band, a receptacle for collecting the cut off threads, said receptacle being formed partly by the stationary plate and by caps attached at both ends of the rear guiding roller for the endless band and partly by a wall connecting the caps and by said rear guiding roller, a cover pivotally mounted on the underside of the collecting receptacle and arranged to close a slot formed in the stationary plate.

10. In an apparatus for cutting binding threads, two knife edges converging toward the front end of the apparatus, two guide rollers, an endless band passing over said rollers for holding the threads fast while they are cut, a rail resting upon the lower half of said band, a spring actuated presser jaw acting upon said rail, a stationary plate supporting the lower half of said band, means for moving said band, a brush to strip the cut off binding threads from the endless band, a receptacle for collecting the cut off threads, said receptacle being formed partly by the stationary plate and by caps attached to both ends of the rear guiding roller for the endless band and partly by a wall connecting the caps and by said rear guiding roller, said connecting wall being fixed to the stationary plate and the brush being detachably secured to said wall, and a cover pivotally mounted on the underside of the collecting receptacle and arranged to close a slot in the stationary plate.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

ALOIS TSCHERNE.

Witnesses:

EUGENE NABEL, RANDALL ATKINSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

